homocentric pencil of rays

例句：

1. 1.The design of the building is homocentric.
   这座建筑的设计是同心的。
2. 2. The planets revolve around a central star, which is called the Sun.
   行星围绕一个中心恒星旋转，这个恒星被称为太阳。
3. 3. The center of the Earth is where all the planets are located.
   地球的中心是所有行星的位置。